40645420 has 12 divisors (see below), whose sum is σ = 85355424. Its totient is φ = 16258160.

The previous prime is 40645399. The next prime is 40645463. The reversal of 40645420 is 2454604.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1016116 + ... + 1016155.

It is an arithmetic number, because the mean of its divisors is an integer number (7112952).

Almost surely, 2^40645420 is an apocalyptic number.

It is an amenable number.

40645420 is an abundant number, since it is smaller than the sum of its proper divisors (44710004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40645420 is a wasteful number, since it uses less digits than its factorization.

40645420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2032280 (or 2032278 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 40645420 is about 6375.3760673391. The cubic root of 40645420 is about 343.8248048772.

The spelling of 40645420 in words is "forty million, six hundred forty-five thousand, four hundred twenty".